Explanation: When embarking in a survival craft during a Distress situation, the priority is to ensure search and rescue authorities are alerted and can locate you. **Why C is correct:** EPIRBs (Emergency Position Indicating Radio Beacons) are designed to transmit a distress alert and position via satellite to a Rescue Coordination Center (RCC). SARTs (Search and Rescue Transponders) help search and rescue units locate the survival craft by appearing on their X-band radar. Both are critical for successful rescue and are specifically designed for continuous operation once activated in a distress. Activating them immediately ensures the earliest possible alert and continuous homing signals. **Why A is incorrect:** While activating EPIRB and SART prior to embarking is ideal, the instruction to "remain aboard vessel in Distress" contradicts the premise of embarking in a survival craft, which implies abandoning ship. **Why B is incorrect:** Portable VHF DSC radios are not standard equipment for distress alerting from a survival craft on the global scale; their range is limited. EPIRBs provide a satellite-based alert with global coverage. **Why D is incorrect:** Inmarsat-C terminals are typically not carried in basic survival craft for distress alerting. The EPIRB is the primary satellite-based distress alerting device for survival craft, designed specifically for this purpose.